The middle stone age and the later stone age corresponds to the middle and the late pleistocene.
Cultural evolution during the middle and the late pleistocene :-
In southwestern Asia as well as northern and southern Africa, personal ornaments in the form of perforated seashells are recorded from the early Late Pleistocene. In the Old World, Neanderthals and anatomically modern humans are linked to a range of personal ornamentation by about 40,000 years ago (Ka). These include fully created ornaments as well as organically modified things. The appearance of figurative art, mythical imagery, and other types of items, like as musical instruments, at various times in history suggest that completely modern behavior began to emerge more gradually towards the middle of the Late Pleistocene and most definitely no later than 40 Ka. Many, but not all, of the lengthy and rigorous history of study might well have helped to the relevant data come from Europe.
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which part of the eye is sensitive to light?
Which part of the eye is sensitive to light?
Retinasorry kalo salah
To ligth The sensitive of teh eye
Disadvantages of smoking
Answer:
lung cancer
Explanation:
people die everyday due to smoking so we must take action also smoking has no benifits only losses
Help me really quick please
Answer:
a
Explanation:
potential energy is highest at its highest point
Arrange the following concepts from simplest to most complex: Chromosomes, DNA, Genome, Gene
Answer:
DNA -> Gene -> Chromosome -> Genome
Explanation:
A genome is an organism's complete set of DNA including all of its genes. Each genome contains all of the information needed to build and maintain that organism. Chromosomes are the threadlike structures located inside the nucleus of animal and plant cells. A gene is the basic physical and functional unit of heredity.
The material and components that are vital for the growth and functioning of an organism that gets inherited from parent to offspring are the components of genetic information.
From simplest to complex they are arranged as:
DNA ⇒ Gene ⇒ Chromosome ⇒ Genome
DNA is the deoxyribose nucleic acid and is the genetic material that transports the instruction for development and function for growth. Gene is a unit of hereditary that codes for gene products.DNA molecules packed as a thread-like structure is called chromosomes.The entire set of genes that pass from parent to offspring is called the genome.To learn more about genome and genes follow the link:
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Mitosis a single cell divides to produce two daughter cells what must happen in the original sound of the daughter cells has a complete set of chromosomes
Answer:
Explanation:
In mitosis, when a single cell divide into two daughter cell and each daughter cells have a copy of chromosomes, there must first be the copying of the chromosomes from the parent cell and after that the chromosomes are separated or there is separation of chromosomes into each of the daughter cells.
Soil erosion can be BEST prevented by
- Heavily watering the vegetation on the slope
- Increasing the slope of the land by adding more soil
- Building terraces into the sides of a slope
- removing grass from the steepest slope.
I need help!!
Answer: Following are some of the methods of soil erosion prevention: Plant trees on barren lands to limit erosion of soil. Add mulch and rocks to prevent the plants and grass underneath to prevent soil erosion. Mulch matting can be used to reduce erosion on the slopes.
Answer:
Building terraces into the sides of a slope
state birth control methods according to Islam view?
Answer:
Writings of Muslim jurists make it clear that Islam allows for the use of reversible methods of contraception (birth control), including oral contraceptives (birth control), condoms, coitus interruptus, emergency contraception, injections, subdermal implants, IUDs, spermicides, and diaphragms.
Explanation:
What would happen if there was too much Carbon Dioxide in the atmosphere? What if there were no processes to pull Carbon
Dioxide out of the atmosphere?
What change caused the population increases around point A?
At point A, the birth rate is much higher than the death rate hence there is an increase in the population.
What is the population?The term population has to do with the number of organisms that live in a particular habitat at a particular time. There are two main forces that control the population of a place and this is the birth rate and the death rate.
The birth rate refers to the number of the new individual organisms that are added to the habitat while the death rate refers to the number of organisms that leave the habitat. This could be used to decipher the trend in the population as discussed below.
Given that a population in which the birth rate is far higher than the death rate would experience an explosion, such a population would now grow in leaps and bounds and it would be difficult to contain the number of individuals therein.
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PLEASE ANSWER ALL QUESTIONS! THANKS!
Which of the following statements about salinity is true?
Question 1 options:
Ocean water near areas with low evaporation has higher salinity.
Ocean water in regions with high levels of precipitation has higher salinity.
Ocean water near rivers has a lower salinity.
Ocean water in areas with high humidity has a higher salinity
How are latitude and temperature related?
Question 2 options:
Lower latitudes will have warmer water because it is closer to the equator.
Higher latitudes will have warmer water because it is closer to the equator.
Higher latitudes will have warmer water because it is closer to the poles.
Lower latitudes will have warmer water because it is closer to the poles
How does salinity vary with freezing and melting?
Question 3 options:
Both freezing and melting decrease salinity.
Both freezing and melting increase salinity.
Freezing decreases salinity, while melting increases salinity.
Freezing increases salinity, while melting decreases salinity.
How does salinity vary with evaporation?
Question 4 options:
When water evaporates, it takes salt with it, increasing its salinity.
When water evaporates, it leaves salt behind, increasing its salinity.
When water evaporates, it leaves salt behind, decreasing its salinity.
When water evaporates, it takes salt with it, decreasing its salinity.
Answer:
that guys answers are all wrong except for #3
Explanation:
i took the quiz and got 1/4
Which type of cell is considered the least complex?
Answer:
tissues.
organs.
organ systems.
organism.
Explanation:
Answer:
the answer would be tissues
What happens to the effenciency of the exchange of oxygen in the human body at a high altitude
Answer:
The effiency decreases at higher altitudes
Explanation:
The higher up a person is on a mountain, the thinner the air is due to the lack of plants that can grow. An example of this is Mount Everest. At a certian point on the mountain, called the "Death Zone", the air is too thin to supply enough oxygen to the human body to survive. That's why they bring oxygen tanks with them on their adventures.
science animal cell, please help thanKS ASAP
Answer:
a (so 6)
Explanation:
I hope this is helpful :)
Match each term to the appropriate description.
Answer:
Have a great day!
Explanation:
The appropriate term for each description would be ecosystem, community, population, organism, and species respectively.
Definition of ecological terms?An ecosystem is a community of all living organisms interacting with their environment as a system.
A community is a collection of different populations of organisms.
A population is a group of organisms of the same species capable of mating.
Species are a group of organisms that is capable of breeding to produce fertile offspring.
Thus, the term for each description would be ecosystem, community, population, organism, and species respectively.
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Which of the following are prokaryotic cells?
A) plants
B) fungi
C) bacteria
D) animals
E) B and C only
fungi, bacteria
If I remember right, eukaryotic means there's more than one, so I believe this answer is right
how do we know that change is taking place around us ? what is the need to study change ? explain some example
Answer:
Specialisation in the knowledge society and its need
Posted by Bernardo Lajus on Mon, 01/07/2013 - 11:54.
Contemporary society is characterized by globalization. The information and the speed with which they reach society amaze anyone who has experienced the 1980s and 1990s. Because of the technology and facilities it brings, the recipients of this information become increasingly demanding, in every way. Demanding with you, with others, with things, with everything, making the world so demanding, to the point that services and information are insufficient, exhausting, poor.
Because of this, the world specializes. The professions have gained new directions, new perspectives. The courses that were previously generic, such as engineering, law, medicine, became insufficient and were gaining tributaries. If before the general practitioners of mechanical engineering and law realized the professional demand, over the years and the evolution of society, it required professionals to become specialists, creating branches and opening possibilities.
Today, specialists, masters and doctors are essential for the rapid development of society, required everywhere. Despite the harm spawned (such as time demanded, or "knowing much about little), specialization in the knowledge society brings inegulable benefits. The creation of new jobs, the deepening of knowledge and the quality of services makes society evolve even more.
Thus, although the human being, in his individuality, is not expanding his way of knowing, but rather reducing himself to specificity, society as a whole plunges into a profound expansion of knowledge, bringing this to everyday life, from the most trivial to the most complex of works, specialization is necessary and beneficial.
Explanation:
What is the the process responsible for the synthesis of proteins and mention the cellular structure where the genetic program responsible for this synthesis is located.
Answer: Translation
Explanation:
During the transcription the double stranded DNA act as a separate template strand to produce mRNA molecule. The mRNA molecule encode for amino acid chain that collectively forms the protein. The ribosomes are the sites of protein synthesis the mRNA get attached to the ribosome. Within the ribosome the rRNA molecule instruct the catalytic steps for the synthesis of protein. The amino acid sequence or chain gets stitched together to form the protein.
Estimate the number of cells that belong to each phase of the cell cycle. Then, explain how you made your decision and describe what occurs at each phase of mitosis.
Answer:
well, it starts from one parent cell, every complete phase makes. at least 4 and then i. think those can multiply
Explanation:
What is the definition for polyploidy?
PLZ HELP I"LL GIVE BRAINLIEST
Answer:
gotchu
Explanation:
1. His symptoms consist of difficulty walking and an abnormal gait (pattern of movement such as walking, running, etc)
2. a. one purpose of the blood test was to test his creatine kinase enzyme to see if there were any medical conditions connected to the way he was walking and why it was abnormal
b. the other purpose is to be sure that he has something wrong with his gait. If he does have a medical condition, it was best to see if he had it early on to treat it faster
3. the function of dystrophin gene connects to the cytoskeleton of a fiber which has to do with brain function; we need that to walk. For DMD, that is a condition that alters the way people walk.
4. DMD is inherited from family's genes, so he got it from his birth family probably from his dad's part of the family as DMD effects men more than women
5. It is pretty likely as this medical condition is inheritably passed on. It is likely that his grandchild will get DMD
6. To treat DMD to the best of the ability since there isnt a cure, they could participate in physical therapy and steroids
How does the cardiovascular system deliver nutrients and oxygen to all cells in the body via the flow of blood?
syngamy and triple fusion difference
mark me as brainlest
Answer:
Üçlü füzyonda, üçüncü bir sperm çekirdeği, embriyo kesesindeki merkezi hücre ile birleşerek endospermi üretir. Eşleşme ve üçlü füzyon arasındaki temel fark, eşleşmenin bir tür üretici döllenme olduğu, üçlü birleşme ise bir tür bitkisel döllenmedir .İyi Çalışmalar..
Answer:
Syngamy: Syngamy refers to the fusion of gametes in fertilization.
Triple Fusion: Triple fusion refers to the fusion of a sperm cell with the two polar nuclei during the double fertilization in angiosperms.
Type of Fusion
Syngamy: In syngamy, a male gamete fuses with a female gamete.
Triple Fusion: In triple fusion, a male gamete fuses with the central cell.
Result
Syngamy: Syngamy produces the zygote that develops into the embryo.
Triple fusion: Triple fusion produces the endosperm cell that develops into the endosperm.
Ploidy
PloidySyngamy: The result of the syngamy is diploid.
Triple Fusion: The result of the triple fusion is triploid.
Type of Gametes
Type of GametesSyngamy: Both male and female gametes are involved in the syngamy.
Triple Fusion: Only male gametes are involved in the triple fusion.
Type of Fertilization
Syngamy: Syngamy is a generative fertilization.
Triple Fusion: Triple fusion is a vegetative fertilization.
Occurrence
OccurrenceSyngamy: Syngamy occurs in animals and plants.
Triple Fusion: Triple fusion occurs in angiosperms.
Conclusion
Syngamy and triple fusion are two types of events in the sexual reproduction of plants. Syngamy is the fusion of male and female gamete, producing the zygote. Triple fusion is the fusion of a male gamete with the central cell of the female gametophyte, producing the endosperm. The main difference between syngamy and triple fusion is the type of fusion of cells in each event.
I hope it's helpful!
A femur is a leg bone found in a human skeleton. When evaluating the human body's levels of organization, a femur is best classified as —
A.
an organ, because it is part of the skeletal system.
B.
an organ system, because it is composed of many cells.
C.
an organelle, because it is composed of many tissues.
D.
an organism, because it is part of the skeletal system.
Answer:
Option A
Explanation:
The femur is classified as an organ, because it is part of the skeletal system
The level of organization is the order that includes cells, tissues, organs, organ systems, and organisms. The femur is a leg bone which is an organ which is a part of organ system called the skeletal system.
What is skeletal system?The basic framework of body is skeletal system, which is consists of bones, connective tissue, tendons, ligaments, etc.
The four main parts of this system include:
Bone.Ligament.Tendon.Joint.The femur is a leg bone which is an organ that is a part of an organ system called the skeletal system.
Thus, the correct option is A.
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what is the nature of cell-walls in diatoms
Answer:
The cell walls of diatoms are made of silica. Their cell wall construction is known as frustule. It consists of two thin overlapping shells that fit into each other such as a soap box. When the diatoms die, the silica in their cell walls gets deposited in the form of diatomaceous earth.
Put "Gene Pool" in a sentence
Answer:
A gene pool is a collection of all the genes in a population. This can be any population - frogs in a pond, trees in a forest, or people in a town.
Explanation:
The North Pole and the South Pole are
A:Classified as tundra biomes
B: Not home to any animals
C: not classified into major biomes.
D: Part of Aquatic Ecosystems
Answer:
A
Explanation:
classified as tundra biomes
Which is the last link in the wetlands food chain?
A. Consumers
B. Predators
C. Decomposers
D. Producers
Answer:
BRO THE CORRECT ANSWER IS .... C) DECOMPOSTER
Explanation:
I KNOW IT IS SAME BUT STILL YOU CAN MARK ME AS BRAINIEST
A student flips a light switch but the light does not turn on. Based on this
information, which inference is NOT valid? *
The light switch is broken
The elecrical wire is copper
The electrical connection is broken
The light bulb is burned out
Answer: the electrical wire is copper
Explanation:
An example of a nucleotide is?
A. cytosine, ribose, and deoxyribose
B. guanine, deoxyribose, and phosphate
C. uracil, deoxyribose, and phosphate
D. thymine, ribose, and phosphate
Answer:
B
Explanation:
A nucleotide always consists of 3 things:
1. A sugar group (either ribose or deoxyribose, ribose if the nucleotide is from RNA, deoxyribose if it is from DNA.
2. A phosphate group
3. A nitrogenous base (A/T/U/C/G) This base depends on whether you have RNA or DNA, U is only for RNA. DNA has either A/T or C/G but never U.
The genetic makeup of an organism or its combination of alleles
Answer:
Genotype
Explanation: